Heading-machine.



Patented Aug. 28, I900.

C. W. DURCHSCHLAG.

HEADING MACHINE.

(Application filed Nov. 14, 1899.)

4 Shaets-$heet I.

(No Model.)

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Patented Aug. 28, I900.

HEADING MACHINE.

(Application filed Nov. 14, IBQQJ 4 SheetsShaet 2.

(No Model.)

No. 656,782. Patented Aug. 28, I900.

C. W. DURCHSCHLAG.

HEADING MACHINE.

Application filed Nov. 14, 1899.) (No Model.) 4 SheetsShaat 3.

Zl/z7zi25555 I ZZZ/$222271:

IA I M MM%( No. 656,782. Patented Aug. 28, I900.

C. W. .CHSCHLAG.

HEA MAGHI (Application filed Nov. 14,

(N0 MOdBL) 4 SheetsShaot 4.

CHARLES w. DURCHSGHLAG, on dism s OHIO, ASSIGNOR TO THE ACME MACHINERYCOMPANY, or sAiuE PLACE.

HEADlNG-MACi-HNE.

SPECIFICATION forming part of Letters Patent No. 656,732, dated August28,1900. Application filed November 14, 1899. Serial No. 736,973. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, CHARLES W. DUROH- SOHLAG, a citizen of the UnitedStates, and a resident of Cleveland, county of Ouyahoga, and State ofOhio, have invented certain new and useful Improvements inHeading-Machines, of which the following is a specification, theprinciple of the invention being herein explained and the best mode inwhich I have contemplated applying that principle and the movablesupport for' the clevis to be acted upon, showing a portion broken awayand removed; Fig. II, a view of the stationary die, the movablesupport,and the plunger, showing the clevis in position in the die andacted upon by the plunger; Fig. III, a top plan View of the stationarydie, the moving die, and the movable support; Figs. IV and V,respectively, a side view and a top View of the plunger andhammer-stock; Fig. VI, an end View of the hammer-stock; Fig. VII,

a rear end View of the dies, showing a portion of the stationary diebroken away and removed to show the sliding pin-support for the innerend of the clevis; Fig. VIII, a front end view of the stationary die;Figs. IX and X, respectively, a side and a topview of the,

clevis.

The devices embodying my invention are designed for use in the ordinaryheading machine, in which the bar of metal to be upset or otherwiseshaped is clamped between a stationary and a moving die and thereupon isstruck endwise by a reciprocating hammer or plunger. hen operating upona bar of metal, such bar has been fed from one end in between the diesand held while the dies closed about the end of thebar and clamped suchend, whereupon the hammer acted from the other end upon the clamped endof the bar. In such case the bar can be manually or otherwise supportedwhile its end is being clamped by the dies; but when a short pieceofmetal, such as the illustrated clevis, was to'be acted upon aheading-machine was useless, as the short piece could not be held whilethe dies clamped upon the same. The clevis A, for which the presentdevice is designed, is used in the construction of boilers, although, ofcourse, other uses may be made of the same, and consists of a shortforked piece of metal having a round shank a and flat cheeks b, havingrounded end edges 0, as illustrated in Figs. IX and X. In thecompletely-finished clevis a threaded hole is made in the shank and theforked flat cheeks have eyes formed through them. Heretofore this styleof clevis has only been capable of being forged byhand, as it could notbe held in a heading-machine, so that its 1nanufac ture wascomparatively expensive. By the present devices the clevis may be madein a heading-machine and may be made at a eon1- paratively-low expense.The blank clevis is simply a short piece of metal having one end roughlyforked.

. The stationary die 1 has a die-cavity consisting of a semicylindricalportion 2, forming the cylindrical shank, and a flat-sided portion 3,forming the checks. The rear wall 4 of the die has a circularbevel-edged recess 5 for forming the end of the shank, and rabbets 6 areformed at the upper and lower edges of the flat-sided portion. Themoving die 7 is an exact counterpart of the station ary die, exceptingfor the fact that the open end of the semicylindrical portion 8 of itscavity bears against the face of the rear wall 4 of the stationary die,completing the cylindrical die-cavity around the beveled recess. Theflat-sided portion 9 and rabbets 10 are similar to, register with, andcorrespond to the same parts of the stationary die. The bottom of thebeveled circular recess in the rear wall has preferably a central pin11, which serves to mark the center for'drilling and threading the holein the shank. The plunger 12, which shapes the slot in the clevis andthe end edges of the clevis, is formed with the tongue 13, the forwardedge of which is rounded to form the round inner end of the slot andwhich is wider than the cheek-cavities of the dies, so as to fit andslide in the rabbet portions of the dies. Two concave segmentalshoulders 14: are formed at the sides of the inner end of the tongue toshape the round edges of the clevischeeks. Suitable means, the same asused in all heading-machines, are used to support the stationary die, tomove the moving die against the latter, and to move the plunger endwiseinto the joined dies after the moving die has closed in upon thestationary die. The plunger is secured in a reciprocating hammer-stock15, formed with a cylindrical recess 16 in. the end for the reception ofthe cylindrical shank 17 of the plunger. A notch 18 is formed in theshank of the plunger, havin g its forwardly-facin g side inclined at anangle of about forty-five degrees to the axialline of the plunger, and aset-screw 19 is inserted through an opposedly-inclined bore 20 in thehammer-stock, so that the end of the inclined set-screw will bear plumbagainst the inclined face of the notch in the plunger-shank. Thisfastening will serve to draw the plunger tightly into the hammer-stockand will prevent injury to the end of the set-screw from the blow of theplunger, as the jar upon the latter. will be in the same direction asthe incline of the screw and the strain upon the end of the screw inwithdrawing the plunger from the dies and clevis will come squareagainst the end of the screw. For the purpose of supporting the innerend of the clevis-blank while the dies are open and up to the time theyare completely closed a disappearing pin 21 projects from and slidesinto the face of the stationary die beneath the semicylindrical portionof the die-cavity in the same. A large bore 22 is transversely formedfrom the outside of the die, ending in a smaller bore 23, openingthrough the face of the die. The pin fits to slide in said smaller boreand has a collar 24 upon it which limits its outward movement andagainst which a spring 25 bears, which spring is coiled around the innerportion of the pin within the large bore. The end of said bore is closedby a screw-plug 26, against which the other end of the spring bears.Said pin will thus project beneath the die-cavity to provide a supportfor the clevis-blank when the dies are open, and the face of the movingdie will force ,the pin into its bore against the spring as the movingdie is forced against the stationary die, the pin, however, supportingthe blank until the dies are closed. The spring will immediately projectthe pin when the dies are again opened.

A disappearing platform-support is provided for the cheek portion of theclevis, and consists of a flat arm 27, fulcrumed between two lugs 28 andextending toward the forward faces of the dies. Said arm has a socket 29upon its under side, in which socket one end of a spring 30 fits. Thelower end of the spring is fitted in a socket 31 in the foundation forthe stationary die. Said spring serves to support the end of the armnorinally at a level with the lower edges of the cheek-cavities of thedies and permits the arm to be depressed and to again return to itsposition. For the purpose of limiting the upward throw of theplatform-arm a short arm 32 extends downward from the fulcrum of saidarm and has an adjusting stop-screw 33 threaded through it, the end ofwhich screw bears against a stop-lip 34 upon the die-foundation. Bymeans of said adjustable-stop device the platform-arm may be adjusted tohave itsend at the desired level with the lower edges of thecheek-cavities of the dies, so as to support the outer end of theclevis-blank at the proper height. The lower corner 35 of the roundededge of the plunger is preferably rounded, so that the advancing plungermay bear with said corner against the inclined upper face of theplatform-arm and force the same down out of the way of the plungerentering the dies.

In practice, the dies and hammer-stock and plunger being supportedandactuated in the manner usual in heading-machines, the heatedclevis-blank is placed between the open dies, with the shank restingupon the disappearing pin and the end of the cheek portion upon the endof the disappearing platform. The dies are thereupon closed, whereuponthe plunger advances, entering between the cheeks and driving the blankinto the dies, where the shank is shaped and the center marked by thecentering-pin, while the tongue and shoulders of the plunger shape theslot and cheeks. When the plunger recedes and the dies open, the clevisdrops out or is removed and the platform and pin reappear, ready toagain support another blank. In this manner short objects may be shapedin a heading-machine of the ordinary construction, and the ad vantagesof strength and compactness caused by the compression of the heatedmetal, contrasted to the drawing out of the metal in forging, may beattained.

Other modes of applying the principle of my invention may be employedfor the mode herein explained. Change may therefore be made as regardsthe mechanism thus disclosed, provided the principles of constructionset forth, respectively, in the following claims are employed.

I therefore particularly point out and distinctly claim as myinvention 1. In a machine for shaping short metal objects, thecombination with a stationary die and a movable die and a plungeroperating endwise into the joint die-cavity formed by said dies, of ablanksupport arranged beneath the inner portion of said cavity todisappear in and enter the face of one of said dies, and a movableblank-supporting platform at the outer end of the die-cavity andconstructed to be moved out of the way of the plunger by the latter,substantially as set forth.

2. In a machine for shaping short metal objects, the combination with astationary die and a movable die and a plunger operating endwise intothe joint die-cavity formed by said dies, of a blank-supporting pinsliding through the face of one die beneath the inner portion of saidcavity against the face of the opposed die and having means for forcingit outward, and a movable blank-supporting platform at the outer end ofthe die-cavity having an inclined face to be engaged and depressed bythe advancing plunger and means for again raising it, substantially asset forth.

3. In a machine for shaping short metal objects, the combination with adie structure and a plunger operating endwise into the diecavity of saidstructure, of a movable blanksupporting platform at the entrance to saiddie-cavity having an inclined face to be engaged and depressed by theadvancing plunger and means for again raising it, substantially as setforth.

4. In a machine for shaping short metal objects, the combination with astationary die and a moving die, having vertically-opposed faces, of ablank-support arranged to project horizontally beneath the die-cavityand con stucted to disappear in and enter the face of one of said dies,substantially as set forth.

5. In a machine for shaping short metal objects, the combination with adie structure and a reciprocating plunger operating endwise into the diecavity of said structure, of a platform-arm fulcrumed to incline upwardtoward the end of the die-cavity to he struck and depressed by theadvancing plunger, and having means for again raising it, substantiallyas set forth.

6. In a machine for shaping short metal objects, the combination with adie structure and a reciprocating plunger operating endwise into thedie-cavity of said structure, of a platform-arm fulcrnmed to inclineupward toward the end of the die-cavity to be struck and depressed bythe advancing plunger and having means for again raising it, and anadjustable stop device for controlling the upward movement of theplatform-arm, substantially as set forth.

7. In a machine for shaping short metal objects, the combination with adie structure and a reciprocating plunger operating endwise into thedie-cavity of said structure, of

a platform-arm fulcrumed to incline upward dies, of a spring-actuatedblank-supporting pin sliding through the face of the stationary diebeneath the inner portion of its die-cavity and engaged and forced backby the face of the moving die, and a movable blank-supporting platformfulcru med to incline upward toward the outer end of the under side ofthe die-cavity to be depressed by the advancing plunger and having aspring for again raising it and an adjustable stop device forcontrolling the upward movement of the platform, substantially assetforth.

9. In a machine for shaping clevises, the combination with a stationaryand a movable die, the joint cavity of said dies having a cylindricalinner portion and a beveled end and fiat cheek-forming portions, and areciprocating plunger having a tongue formed with a rounded forward edgeand concave segmental shoulders, of a spring-actuated pin slidingthrough the face of the stationarydie beneath the cylindrical portion ofits die-cavity and engaged and forced back by the face of the movingdie, and a movable blank-supporting platform fulcrumed to incline upwardtoward the outer end of the under side of the die cavity to be depressedby the advancing plunger and having a spring for again raising it and anadjustable stop device for controlling the upward movement of theplatform, substantially as set forth.

In testimony that I claim the foregoing to be my invention I havehereunto set my hand this 27th day of October, A. I). 1899.

CHARLES IV. DUROHSOHLAG.

Witnesses:

WM. SEOHER, ALFONSO H. CARPENTER.

